“Y’all” is pretty much universal, of course, but growing up in Mississippi I’ve picked up lots of other interesting slang. I used to ask my mother where “yonder” was supposed to be – “Is it right, left, north, south?” – and we have lots of mosquito hawks and lightning bugs buzzing around our backyard.
When my mother would get flustered at me she’d yell, “You could worry the horns off a billygoat!” and I used to hate getting redbugs when I played outside. Some of my family members pronounce “fire” as “fahr”. We eat breakfast, dinner, and supper.